Body fat percentage calculator (US Navy method)
Estimate body fat from height, neck, waist and hip measurements with a tape measure.
A tape-measure estimate, typically within a few percentage points of lab methods. It is not a diagnosis.
How this calculator works
The US Navy equations (metric). For men: 495 ÷ (1.0324 − 0.19077 log₁₀(waist − neck) + 0.15456 log₁₀(height)) − 450. For women, the hip measurement is added to the waist and different constants are used. Measure relaxed, without pulling the tape tight.
Worked example: a man 178 cm tall with a 38 cm neck and an 86 cm waist comes out at about 17%.
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